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MAJOR DIVISIONS LETTER TYPICAL DESCRIPTION <br /> SYMBOL <br /> Clean GW Well-graded gravels,gravel-sand mixtures, little or no fines. <br /> Gravels(less <br /> co m MorGRAVELSthan 5% <br /> than 50% <br /> J 2) fines} GP Poorly graded gravels, gravel sand mixtures, little or no fines. <br /> O co N of coarse fraction <br /> (I) m is larger than No. GM Silty gravels,gravel-sand-silt mixtures, non-plastic fines. <br /> w (• i) 4 sieve Gravels with <br /> Z 2 'co fines <br /> E F:; GC Clayey gravels, gravel-sand-clay mixtures, plastic fines. <br /> 0o <br /> o N <br /> O a o Clean Sands SW Well-graded sands, sands with gravel, little or no fines. <br /> 0a Z SANDS (less than <br /> Q More than 50% 5%fines) SP Poorly-graded sands,sands with gravel, little or no fines. <br /> O o "-' of coarse fraction <br /> 2 is smaller than SM Silty sands, sand-silt mixtures, non-plastic fines. <br /> No. 4 sieve Sands with <br /> fines SC Clayey sands, sand-clay mixtures, plastic fines. <br /> Zr) ML Inorganic silts, rock flour, clayey silts with slight plasticity. <br /> To <br /> � <br /> Cl)al a. � SILTS AND CLAYS <br /> p m Liquid Limit is less than 50% CL Inorganic clays of low to medium plasticity. (Lean clay) <br /> .L , <br /> o ca 'in OL Organic silts and organic clays of low plasticity. <br /> Z_ <br /> Eo • <br /> 0 <br /> ao N L(') o MH Inorganic silts, elastic. <br /> O , Z SILTS AND CLAYS <br /> z ca▪ t Liquid Limit is greater than 50% CH Inorganic clays of high plasticity. (Fat clay) <br /> li N — <br /> o OH Organic clays of high plasticity. <br /> 2 <br /> HIGHLY ORGANIC SOILS PT Peat. <br /> DEFINITION OF TERMS AND SYMBOLS <br /> co Standard Penetration 2"OUTSIDE DIAMETER SPILT SPOON SAMPLER <br /> w <br /> w Density Resistance in Blows/Foot <br /> -J <br /> Z I 2.4"INSIDE DIAMETER RING SAMPLER OR <br /> O Very Loose 0-4 SHELBY TUBE SAMPLER <br /> cn Loose 4-10 <br /> w Medium Dense 10-30 y WATER LEVEL(Date) <br /> O Dense 30-50 <br /> U Very Dense >50 <br /> Tr TORVANE READINGS,tsf <br /> Standard Penetration Pp PENETROMETER READING,tsf <br /> uJ Consistancy Resistance in Blows/Foot <br /> > DD DRY DENSITY, pounds per cubic foot <br /> 2 Soft Soft 2 4 LL LIQUID LIMIT, percent <br /> O Medium Stiff 4-8 <br /> U Stiff 8-16 PI PLASTIC INDEX <br /> Very Stiff 16-32 <br /> Hard >32 N STANDARD PENETRATION, blows per foot <br /> eTerra UNIFIED SOIL CLASSIFICATION SYSTEM <br /> \ NORTHSHORE CHRISTIAN CHURCH BUILDING F <br /> kst ' i Associates, Inc. EVERETT, WASHINGTON <br /> Consultants in Geotechnical Engineering <br /> Geology and Pro No.T-5922-6 Date NOV 2016 Figure A-1 <br /> Environmental Earth Sciences 1• g <br />